Holding means for loom bushings



Oct. 7, 1952 w. w. USRY HOLDING MEANS FOR LOOM BUSHINGS Filed June 20,1951 INVENTOR r LA.-

ATTORNEY VVoomeow VVL (JCS/Ev;

Patented Oct. 7, 1952 i UNITED STATES PA ENT TOFFICE 1 My inventionrelates to improvementsin picker mechanism for looms; and moreparticular to the holding means for the bushing which receives the guiderod or spindle f or the picker.

In at least one type of automatic loom'for the 5 weaving of textilefabrics, the picker is slidable on a guiding rod ors plndle one end ofwhich is supported in a bushing-which is screwed into a threaded openingin the lay end-plate of they loom, In the operation of the loom thevib-ration and the shock incident to boxingof the shuttle, causes theexternally screw threaded bushing for the picker rod to work loose .andthereby interfere with the proper guiding of the picker and the shuttle.The vibration is such that the screw threads in the hole of the layendplate wear to such an extent that the plate must be replaced by a newone as often as twice a year. That, of course, means not only thesubstantial cost of the new lay end-plates and the cost of replacementlaboigbut also the loss due to the loom being out of service Variousattempts have been made to overcome this trouble but they have not beenentirely"satisiacto1'y; and

the loom manufacturer has continued to use these troublesome threadedbushings without any looking or holding means therefor. Afterconsiderable study and experimental work with, different means forholding the threaded bushing,

I have thoroughly tested the one herein disclosed and have found it tobe entirely efiective and satisfactory. The principal object of theinvention is, therefore, to provide an improved holder or look for thescrew threaded bushing which holds oneend of the picker guiding rod orsplndle of a loom.

Such threaded bushings are provided with hexagonal wrench-engaging headsto permit them to be screwed into the threaded holes in the layend-plates, and it is another object of the invention to provide aholding or locking device which may be applied to the bushing head inany of the various positions it may be in when it is tightened in itsthreaded hole in the lay end-plate.

Another object is to provide a device of this character which is simple,effective and relatively inexpensive, and which may be quickly andeasily applied.

With the above and other objects and advantages in view, the inventionresides in the novel combinations and arrangements of parts and thenovel features of construction hereinafter de-. scribed and claimed, andillustrated in the accompanying drawings which show the presentpreferred embodiment of the invention.

2 Claims. (Cl. 139-158) 2v In the drawings:

Figs. 1 and 2 are perspective views of the oppqsitesides of parts of awell known type of loom to illustrate the application of the invention;

Fig. 3 is an elevation of the outer face orside I of a lay end-plateshowing my locking or holding device applied thereto and to the head ofthe bushing, the picker guide rod being also shown and apart of theend-plate being broken away;

Fig. 4 is a vertical sectional view on line i'l ofFig.3,and

Fig. 5 is a perspective view of the new bushing holding or lockingmember. r

In Figs. 1 and 2 are shown parts of the well known 0-6 automatic textilefabric weaving loom marketed by Crompton & Knowles Loom Works ofWorcester, Massachusetts, Fig. 1 showing my bushing holding memberapplied to the lay endplate I'D. Thisplate I0 is removably fixed to theend of the frame work I I of the lay andis formed 1 with a screwthreaded hole l2 which receives the bushing I3.

The plate i0 is also formed with vertically extending slots 14, oneabove and the other below the hole I2 as seen in Fig. 3. The bushing I3is in the form of a cylindrical sleeve with an enlarged hexagonal orother flat faced head l5 at one end to Which a wrench may be applied.The exterior of the sleeve or body is screw threaded from its head toits opposite end for engagement with the threads in the hole [2. Thecylindrical bore I5 through the bushing is of a diameter to snuglyreceive end of the guide rod or spindle I! for the slidable picker, therod 11 also passing through a hole in a part of the lay frame II, asseen in Fig. 4. The other end portion of the rod or spindle I! whichcarries the usual buirer I8 for the picker stick is suitably supportedand held against rotary and endwise movement on the lay frame. The abovedescribed parts are all old in the above identified loom.

My invention comprises a bushing engaging and holding member or plate 25and means for adjustably fastening it to the lay end-plate It. Themember 25 may be cast or otherwise formed of suitable metal, and it ispreferably in the form of a substantially fiat elongated plate, one endportion 26 of which may be of substantially cirbe of generally segmentalshape. Formed centrallyin the smaller end 26 is a flat walled hole oropening 28 shaped to snugly receive the head [5 of the bushing, suchhead being usually of hexagonal shape. The larger end 21 is formed 1with an arcuate slot 29 which is concentric with and support one.

the center of the hole 28 and hence with the bore 16 of the bushing l3when the end 26 is seated on the head l5 as shown in Figs. 3 and 4. Thesize and proportions of the locking member or plate 25 are such thatwhen it is applied to the bushing the slot 29 may be disposed acrosseither of the slots M in the lay end-plate, and hence a clamping bolt 30disposed in the intersecting slots may be used to securely fastenth'e'device to the lay end-plate. The head of the bolt may engage theouter face of the portion 21 and on the screw threaded end of the boltthere are applied an ordinary washer 3|, a lock washer 32 and a nut 33,as seen in Fig. 4. The provision of the slot 29 in connection with thehexagonal hole 28 is important since it permits a portion of the slot 29to intersect one or the other of the slots M without regard to theposition of the head I5 when the bushing is screwed tight in the holel2.

When the bolt 30 is tightened to rigidly clamp the device against thelay end-plate the bushing 13 will be rigidly held even though thethreads in the hole l2 have been worn because hole 28 is of a size tosnugly fit the head l5. An extended test of the device has shown that itwill effectively prevent the loosening of the bushing and wear of thethreads in the hole l2 so that the life of the lay end-plate is greatly'extended' The use of the device therefore saves considerable expense inthe operation of a loom.

In the drawing the spindle or rod I1 is shown as terminating at theouter face of the bushing head l5 but in practice it projects beyondsaid outer face. In some looms such projecting end carries a small oilor grease box to lubricate the spindle. Also in some looms a metal stripbears against such projecting end of the spindle to prevent end-wisemovement of the latter. These 0ld parts are not illustrated, but theiruse does not interfere with the application of my invention since theplate 25 lies in the plane of the head l5, The slots M in the layend-plate receive bolts for fastening the latter to the lay frame I I.One of these bolts may be the bolt 30 which is in such case made alittle longer than the bolt (not shown) in the other slot i4.

From the foregoing, taken in connection with the accompanying drawing,it will be seen that novel and advantageous provision has been made of aguiding spindle for a picker, the bushing having a flat facedwrench-engaging head, said means comprising a substantially flat andelongated plate having at one end a flat-walled opening shaped to fitthe head of the bushin and at its other end an arcuate slot concentricwith said opening and disposable in intersecting relation with the slotin the lay end-plate, and a screw threaded fastening to be positioned inthe intersecting slots for clamping said plate against the layend-plate.

2. The combination of a lay end-plate having a screw threaded hole and aslot adjacent said hole, a bushing to hold one end of a picker guidingspindle, said bushin having a flat-faced head at one end, its other endhaving external screw threads to engage the threads in said hole, abushing-holding plate having a flat walled opening to fit said head ofthe bushing and an arcuate slot concentric with said flat-walled openingand disposed in intersecting relation to said slot in the lay end-plate,and a screw threaded fastening in said intersecting slots to clamp saidholding plate against said lay end-plate, p

WOODROW W. USRY.

REFERENCES orr'n'n The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

